There’s been a lot of shaming and blaming of the anti-vaccination crowd in response to the Disneyland measles outbreak (even we did it). And when we released our investigation of vaccination rates at Silicon Valley preschools, people were justifiably angry: Every unvaccinated kid at those schools threatens the greater community’s protection against disease. But yelling at anti-vaxxers […]

The misery of a measles outbreak at the Happiest Place on Earth is an irony even the most jaded epidemiologist could do without, but the 42 measles cases that originated in Disneyland in December hide within them an even scarier number—scary, that is, unless you understand how vaccines work.